I will never apologize for saying that the future of humanity and the future of the world is going to be defined by what we have in common as opposed to those things that separate us and ultimately lead us into conflict.

I do want to once again speak directly to the Iranian people. Yours is a great civilization with a vibrant culture that has so much to contribute to the world - in commerce and in science and in arts. For decades, your government's threats and actions to destabilize your region have isolated Iran from much of the world, and now our governments are talking with one another. Following the nuclear deal, you, especially young Iranians, have the opportunity to begin building new ties with the world.

Jobs was brave enough to think differently, bold enough to believe he could change the world, and talented enough to do it.

Health care got done because there were a lot of people out there who aren't professional politicians, but are citizens, who pushed for it even when the politics was hard.

All across the world, ...increasingly dangerous weather patterns and devastating storms are abruptly putting an end to the long-running debate over whether or not climate change is real. Not only is it real, it's here, and its effects are giving rise to a frighteningly new global phenomenon: the man-made natural disaster.

I think that where I've gotten frustrated during the course of my presidency has never been because I was getting pushed too hard by activists to see the justness of a cause or the essence of an issue.

Many of our ideas of democracy, so much of our literature and philosophy and science can be traced back to roots right here in Athens.